#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main() {
    int fork_rv;

    printf("Before: my pid is %d\n", getpid());

    fork_rv = fork();        /* create new process  */

    if (fork_rv == -1)        /* check for error    */
        perror("fork");
    else if (fork_rv == 0) {
        printf("I am the child.  my pid=%d\n", getpid());

        exit(0);
    } else {
        printf("I am the parent. my child is %d\n", fork_rv);
        exit(0);
    }

    return 0;
}
